Examine source code of Content Calendar Reminder

{
  "manifest_version": 2,
  "name": "Content Calendar Reminder",
  "version": "1.0",
  "description": "Reminder for scheduled content publishing (blog, video, posts).",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{71fbe2eb-800e-4315-9dc6-20624d6a0b7e}"
    }
  }
}